Wang Huijuan, Shu Yilan, Kuang Zexing, Han Zilin, Wu Jiaheng, Huang Xinmiao, Song Xiaoyong, Yang Jing, Fan Zhengqiu
Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China; South China Institute of Environmental Sciences, Ministry of Ecology and Environment of the People's Republic of China, Guangzhou 510530, China.
Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China.
J Hazard Mater. 2025 Mar 5;485:136946. doi: 10.1016/j.jhazmat.2024.136946. Epub 2024 Dec 18.
Polycyclic aromatic hydrocarbons (PAHs) are persistent pollutants in aquatic environments that can accumulate in marine organisms and pose potential health risks to humans through trophic transfer in the food webs. However, the accumulation and health risks of PAHs in organisms at different trophic levels remain unclear. This study investigated the accumulation and trophic transfer of PAHs in 40 marine organisms from Beibu Gulf (China), and assessed their health risks. Utilizing the trophic level spectrum constructed with stable isotope methods, the organisms were categorized into three trophic levels: Omnivorous (15.00 %), low-level carnivorous (67.50 %), and mid-level carnivorous (17.50 %). The contamination levels of total PAHs in these organisms ranged from "mild pollution" to "moderate pollution", with all organisms exhibiting significant PAH accumulation (Bioconcentration factor value > 2000). Total PAH concentrations increased with higher trophic levels, following the trend of mid-level carnivores > low-level carnivores > omnivores. Notably, only three PAH compounds (Nap, Fla and Phe) showed biomagnification effects, while the others exhibited trophic dilution. Carcinogenic risk assessment indicated an "Unacceptable risk" level for all populations, with the highest risk due to consumption of mid-level carnivorous. These findings offer new insights into the accumulation and health risks of PAHs from a trophic transfer perspective.
多环芳烃（PAHs）是水生环境中的持久性污染物，可在海洋生物体内蓄积，并通过食物网中的营养传递对人类构成潜在健康风险。然而，不同营养级生物体内PAHs的蓄积情况及其健康风险仍不明确。本研究调查了中国北部湾40种海洋生物体内PAHs的蓄积和营养传递情况，并评估了它们的健康风险。利用稳定同位素方法构建的营养级谱，将这些生物分为三个营养级：杂食性（15.00%）、低营养级肉食性（67.50%）和中营养级肉食性（17.50%）。这些生物体内总PAHs的污染水平从“轻度污染”到“中度污染”不等，所有生物均表现出显著的PAH蓄积（生物富集因子值>2000）。总PAH浓度随营养级升高而增加，呈现中营养级肉食性>低营养级肉食性>杂食性的趋势。值得注意的是，只有三种PAH化合物（萘、荧蒽和菲）表现出生物放大效应，而其他化合物则表现出营养稀释。致癌风险评估表明，所有人群的风险水平均为“不可接受风险”，其中因食用中营养级肉食性生物导致的风险最高。这些发现从营养传递角度为PAHs的蓄积和健康风险提供了新的见解。
